Deferred Taxes (Detail) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Provisions	$ 104.9	$ 107.3	$ 101.5
Costs capitalized for tax	18.2	18.6	16.8
Property, plant and equipment	13.0	14.2	18.2
Retirement Plans	50.1	50.0	65.5
Tax receivables, principally NOL’s	113.9	150.2	211.7
Deferred tax assets before allowances	300.1	340.3	413.7
Valuation allowances	(71.0)	(110.6)	(199.6)	$ (177.7)
Total	229.1	229.7	214.1
Acquired intangibles	(6.1)	(6.6)	(12.3)
Statutory tax allowances	(0.5)
Distribution taxes	(22.9)	(22.8)	(16.0)
Other	(10.1)	(3.9)	(4.9)
Total	(39.6)	(33.3)	(33.2)
Net deferred tax asset	$ 189.5	$ 196.4	$ 180.9